水土保持学报2017，Vol.31Issue(2)：79-86,8.DOI:10.13870/j.cnki.stbcxb.2017.02.015
基于坡度等级的喀斯特山区石漠化与水土流失相关性研究——以贵州省盘县为例
Based on the Slope Grade of Rocky Desertification and Water and Soil Loss Correlation Study in Karst Mountain Area: A Case in Panxian County, Guizhou
摘要
Abstract
The aims of this study were to analyze the correlation between rocky desertification at different slopes and water and soil loss quantitatively,and provide the scientific theoretical basis for the ecological environment management and restoration in the county area.Taking Panxian County of Guizhou Province as the research area,with the support of RS and GIS technology,based on ALOS remote sensing images,lithology and 1 ∶ 50 000 topographic maps,using Remote sensing interpretation method,Surface analysis and Map Algebra principle,the index factors of rocky desertification and water and soil loss were extracted.Through ArcGIS spatial analysis and correlation analysis model,analysis of the correlation between rocky desertification at different slopes and water and soil loss in Panxian County.The results showed that:Panxian County had a rocky desertification area of 1 008.45 km2,accounting for 24.9％ of the total area,the degree of rocky desertification was mainly mild,moderate and strong,accounting for 45.47％,29.67％ and 20.29％ of the total area of rocky desertification,respectively.Water and soil loss area was 521.05 km2,accounting for 12.85％ of the total area,the degree of water and soil loss was maily mild and moderate,and 67.75％ and 17.36％ of the area of water and soil loss,respectively.Rocky desertification and water and soil loss occurred in the place where the slopes were between 5 and 35 degrees,accounting for 85.08％ and 82.45％ of the area of rocky desertification and water and soil loss,respectively.When the slopes were less than 8 degrees,there was a negative correlation between rocky desertification and grade of water and soil loss,and between water and soil loss and grade of rocky desertification.When the slopes were between 8 and 35 degrees,the area of rocky desertification and water and soil loss decreased first,then increased,and later decreased again.When the slopes were greater than 35 degrees,rocky desertification and water and soil loss grade were negatively correlated under strong erosion,but the correlation became positive when the erosion went beyond strong erosion.Water and soil loss and rocky desertification grade were positively correlated under mild rocky desertification,but they were negatively correlated when the rocky desertification went beyond mild rocky desertification.关键词
石漠化/水土流失/坡度/相关性分析/盘县Key words
rocky desertification/water and soil loss/slope/correlation analysis/Panxian County分类
农业科技引用本文复制引用
张珊珊,周忠发,孙小涛,冯倩,陈全..基于坡度等级的喀斯特山区石漠化与水土流失相关性研究——以贵州省盘县为例[J].水土保持学报,2017,31(2):79-86,8.基金项目
国家自然科学基金项目“喀斯特石漠化地区生态资产与区域贫困耦合机制研究”(41661088) （41661088）
贵州省重大应用基础研究项目“喀斯特石漠化生态修复及生态经济系统优化调控研究”(黔科合JZ字[2014]200201) （黔科合JZ字[2014]200201）
贵州省高层次创新型人才培养计划——“百”层次人才(黔科合平台人才[2016]5674) （黔科合平台人才[2016]5674）
盘县发展和改革局软科学研究项目“盘县城镇、农业与生态三类空间划分研究”(20151231) （20151231）
